/*
 * Conditions Of Use 
 * 
 * This software was developed by employees of the National Institute of
 * Standards and Technology (NIST), an agency of the Federal Government.
 * Pursuant to title 15 Untied States Code Section 105, works of NIST
 * employees are not subject to copyright protection in the United States
 * and are considered to be in the public domain.  As a result, a formal
 * license is not needed to use the software.
 * 
 * This software is provided by NIST as a service and is expressly
 * provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
 * OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
 * AND DATA ACCURACY.  NIST does not warrant or make any representations
 * regarding the use of the software or the results thereof, including but
 * not limited to the correctness, accuracy, reliability or usefulness of
 * the software.
 * 
 * Permission to use this software is contingent upon your acceptance
 * of the terms of this agreement
 *  
 * .
 * 
 */
package gov.nist.javax.sdp;

import gov.nist.javax.sdp.fields.*;
import javax.sdp.*;
import java.util.*;

/**
 * Implementation of Time Description
 * 
 * @version 1.2
 * 
 * @author Olivier Deruelle
 * @author M. Ranganathan  <br/>
 * 
 * 
 * 
 */
public class TimeDescriptionImpl implements TimeDescription {

	private TimeField timeImpl;

	private Vector repeatList;

	/** Creates new TimeDescriptionImpl */
	public TimeDescriptionImpl() {
		timeImpl = new TimeField();
		repeatList = new Vector();

	}

	/**
	 * constructor
	 * 
	 * @param timeField
	 *            time field to create this descrition from
	 */
	public TimeDescriptionImpl(TimeField timeField) {
		this.timeImpl = timeField;
		repeatList = new Vector();
	}

	/**
	 * Returns the Time field.
	 * 
	 * @return Time
	 */
	public Time getTime() {
		return timeImpl;
	}

	/**
	 * Sets the Time field.
	 * 
	 * @param timeField
	 *            Time to set
	 * @throws SdpException
	 *             if the time is null
	 */
	public void setTime(Time timeField) throws SdpException {
		if (timeField == null) {
			throw new SdpException("The parameter is null");
		} else {
			if (timeField instanceof TimeField) {
				this.timeImpl = (TimeField) timeField;
			} else
				throw new SdpException(
						"The parameter is not an instance of TimeField");
		}
	}

	/**
	 * Returns the list of repeat times (r= fields) specified in the
	 * SessionDescription.
	 * 
	 * @param create
	 *            boolean to set
	 * @return Vector
	 */
	public Vector getRepeatTimes(boolean create) {
		return this.repeatList;
	}

	/**
	 * Returns the list of repeat times (r= fields) specified in the
	 * SessionDescription.
	 * 
	 * @param repeatTimes
	 *            Vector to set
	 * @throws SdpException
	 *             if the parameter is null
	 */
	public void setRepeatTimes(Vector repeatTimes) throws SdpException {
		this.repeatList = repeatTimes;
	}

	/**
	 * Add a repeat field.
	 * 
	 * @param repeatField --
	 *            repeat field to add.
	 */
	public void addRepeatField(RepeatField repeatField) {
		if (repeatField == null)
			throw new NullPointerException("null repeatField");
		this.repeatList.add(repeatField);
	}

	public String toString() {
		String retval = timeImpl.encode();
		for (int i = 0; i < this.repeatList.size(); i++) {
			RepeatField repeatField = (RepeatField) this.repeatList
					.elementAt(i);
			retval += repeatField.encode();
		}
		return retval;
	}

}
